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Assertion: The immune responses of old persons become weak.

Reason: Thymus is degenerated in old individuals resulting in a decreased production of thymosin

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.

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